Spectral line

Ultraviolet

Materials science

Chromatography

Binding constant

Computer science

Metal ions in aqueous solution

Inorganic chemistry

Filter (signal processing)

Stereochemistry

Physical chemistry

Physics

Organic chemistry

Optics

Astronomy

Linear range

Filter paper

Fluorescence

Titration

Analytical Chemistry (journal)

Proton NMR

Naked eye

Crystallography

Chemistry

Detection limit

Optoelectronics

Computer vision

Phosphorus, sulfur, and silicon and the related elements

A symmetrical N2O2-tetradentate dioxime chemical sensor H2L was synthesized for the first time. The sensor H2L can identify S2– ion with dual channels of fluorescence–ultraviolet spectra, and through the calculation of binding constant and detection limit of L-S system, it was showed that H2L can detect S2– ion with high efficiency and specificity. pH response experiments were carried out on L-S system and H2L to explore the pH range recognized by them. The recognition mechanism was determined by 1H NMR titration experiment. At the same time, a new method of macro recognition by means of naked eye recognition (under natural light and ultraviolet light of 365 nm) and filter paper recognition was developed. The practical application of the sensor H2L to detect H2S was evaluated in actual water samples and identification experiment of H2S.

A N2O2-tetradentate dioxime fluorescence probe for highly efficient sensing of S2– and solution discoloration detection of H2S gas